How did the Black Death change the political, economic, and social institutions of Europe?

The plague had social and economic impacts on a wide scale, many of which are documented in the Decameron introduction. People were abandoning their friends and families, leaving towns and shutting themselves out of the city. Funeral rites were perfunctory or entirely ended, and work ceased to be performed. Some felt that the wrath of God fell upon man, and thus battled with prayer against the plague. Some thought that the proverb, "Eat, drink and be merry, for tomorrow you may die." should be obeyed.

Explanation: Hope this helped!

the answer is the second one.

c. a group of tribes that formed a confederacy